I got this several times, too. Duct cleaning. I string them along a bit, before I tell them I don't have ducts.

I have received numerous calls from Sam at Air Duct Cleaning Services who persists in calling repeatedly despite being asked not to call. It is telephone harassment. Nothing I do or say stops the pest calls.

Duct cleaning service, called twice today after being asked repeatedly to stop calling. Number out of service on call back. Would be nice if the DNCL actually did something. No repercussion to pests, no way to block the calls. Maybe time to change phone number.

I asked to be removed from their callers list.. and they told me "no I am not your boyfriend"  I wish I caught the name of the duct cleaning company.. so I could let the owner know about the top quality telemarketing company they hired..

Duct cleaning pest

Calls frequently. Never leaves a message. Today I picked up. Long silence then someone came on the line and said "Yeah, uh hi" and then hung up. Lots of noise in background. Sounds like a call centre. Tried to call them back got message that the number is not in service.